Briefly describe the conduction pathways of conscious proprioception and fine touch

Take a look at each and you'll understand.

The conduction related to conscious proprioception and fine tactile purity in the following structures is ()aWedge selling cautious bundles.

b.Thin bunches are used for panicling.

c.Spinocerebellar tract.

d.Corticospinal lateral tract.

Correct answer: ab

Look at this, it's very clear.

First of all, you have to understand that consciousness exists in every cell. Therefore, each cell knows its own function and role.

It should be like this: proprioceptors at tendons, joints, etc., and fine tactile receptors of ** spinal ganglia Thin tract, wedge bundle Thin bundle nucleus, cuneiform nucleus medial thalamic cross, medial thalamus dorsal thalamus.

Conscious proprioceptive pathway: spinal ganglion pseudomonopolar neurons Thin tract nuclei and cuneiform bundle nuclei The ventral posterolateral nucleus of the dorsal thalamus is projected from the hind limbs of the internal capsule to the posterior gyrus and paralobules.

Rough touch of pain and temperature of the trunk and limbs: spinal ganglion pseudomonopolar neurons Posterior horn propria nucleus ventrolateral nucleus of the dorsal thalamus Projected from the hind limbs of the internal capsule to the posterior 2 3 and posterior paralobules of the posterior gyrus.

Rough tactile sensation of head and face pain and temperature: trigeminal ganglion trigeminal spinal tract nucleus and trigeminal pontine nucleus ventral posteromedial nucleus of the dorsal thalamus projected from the hind limbs of the internal capsule to the lower part of the posterior gyrus 1 3

Superficial sensation: spinothalamic tract conduction pain, warmth, touch. The fibers that conduct sensation from the lower extremities are located in the superficial part of the tract, while the fibers that conduct sensation in the upper extremities are located near the gray matter in the conduction Cambodia.

This bundle is located in the anterior half of the lateral cord and a part of the preprime white matter, which occupies a wide area of white matter. The initiating cells of the spinothalamic tract are located throughout the length of the contralateral spinal cord, but are most concentrated in the cervical and lumbar bulges. Cells are mainly located in the I and V layers of gray matter, and are also present in the layer.

The fibers cross the anterior commissure of the white matter and ascend to the anterolateral cord of the contralateral white matter of the previous segment and terminate in the dorsal thalamus. As it passes through the brainstem, this bundle also emits collateral branches to reticular structures and periaqueductal gray matter.

Deep sensory: thin and wedge bundle conduction. Thin bundles form central processes from spinal ganglion cells below the ipsilateral midthoracic segment, and wedges form central processes from spinal ganglion cells above the ipsilateral midthoracic segment.

Thus, thin bundles located in the medial part and wedge bundles in the lateral part can be seen in the posterior cord only in the cross-section of the cervical and upper thoracic cords; Below the midthoracic (approximately equivalent to T4 stage), the posterior cord is occupied entirely by thin bundles. The thin bundle terminates at the nucleus of the medulla oblongata, and the wedge bundle terminates at the nucleus of the medulla oblongata. Thin and wedge tracts transmit proprioception (positional, kinesthetic, and vibrational sensations) from the lower and upper limbs, respectively, as well as fine or discriminative tactile sensations (such as distinguishing between two points and the thickness of object textures), that is, the peripheral processes emitted by spinal ganglion cells that form thin, wedge-bundled tracts with central processes go to structures located in the deeper parts of the trunk and limbs, such as muscles, muscuolines, bones and joints, as well as receptors with higher internal differentiation.

In the lesions of the posterior cord, proprioceptive and discriminative tactile information cannot be transmitted to the cerebral cortex through these two bundles. As a result, when the patient is unable to use vision (such as closing the eyes or at night), it is difficult to determine the position and movement of the joints, and symptoms such as unsteady standing, uncoordinated movements, and the inability to distinguish the characteristics of the objects they touch occur. In addition to axons from ipsilateral spinal ganglion cells, the thin and cuneiform bundles contain ascending fibers from neurons from the posterior horn of the ipsilateral spinal cord (eg, layer IV) that also terminate at the nucleus of the thin and cuneiform bundles.